from gi.repository import Gtk

from gi.repository import Gdk

import sys

class MyWindow(Gtk.ApplicationWindow):

    # a window

    def __init__(self, app):

        Gtk.Window.__init__(self, title="StatusBar Example", application=app)

        self.set_default_size(200, 100)

        # a label

        label = Gtk.Label(label="Press any key or ")

        # a button

        button = Gtk.Button(label="click me.")

        # connected to a callback

        button.connect("clicked", self.button_clicked_cb)

        # the statusbar

        self.statusbar = Gtk.Statusbar()

        # its context_id - not shown in the UI but needed to uniquely identify

        # the source of a message

        self.context_id = self.statusbar.get_context_id("example")

        # we push a message onto the statusbar's stack

        self.statusbar.push(

            self.context_id, "Waiting for you to do something...")

        # a grid to attach the widgets

        grid = Gtk.Grid()

        grid.set_column_spacing(5)

        grid.set_column_homogeneous(True)

        grid.set_row_homogeneous(True)

        grid.attach(label, 0, 0, 1, 1)

        grid.attach_next_to(button, label, Gtk.PositionType.RIGHT, 1, 1)

        grid.attach(self.statusbar, 0, 1, 2, 1)

        # add the grid to the window

        self.add(grid)

    # callback function for the button clicked

    # if the button is clicked the event is signaled to the statusbar

    # onto which we push a new status

    def button_clicked_cb(self, button):

        self.statusbar.push(self.context_id, "You clicked the button.")

    # event handler

    def do_key_press_event(self, event):

    # any signal from the keyboard is signaled to the statusbar

    # onto which we push a new status with the symbolic name

    # of the key pressed

        self.statusbar.push(self.context_id, Gdk.keyval_name(event.keyval) +

                            " key was pressed.")

        # stop the signal emission

        return True

class MyApplication(Gtk.Application):

    def __init__(self):

        Gtk.Application.__init__(self)

    def do_activate(self):

        win = MyWindow(self)

        win.show_all()

    def do_startup(self):

        Gtk.Application.do_startup(self)

app = MyApplication()

exit_status = app.run(sys.argv)

sys.exit(exit_status)